I just bought a Lincoln Square Wave Tig 175 Pro welder.

The wiring/fuse recomendations are 10 ga/100 amp.

I have a 200 amp home service and a 200 amp panel with two empty breaker slots and two unused 220 v circuits. The unused circuits each have double 30 amp breakers. My home electrical needs are modest so I don't see a max capacity problem.

1. Does a 220v circuit with a double 50 amp breaker = 100 amp circuit or do I need to find a double 100 amp breaker?

2. Do I have to give a modern welder its own box wired directly to a meter lug to prevent problems with sensitive electrical equipment in my home or can I get by with just adding it to my existing box.

3. If I need to separate it can I do so by connecting the feed wires to the same lugs used on the incoming side of my home panel. ie two wires connected to each lug above the main breaker and then feed to another small 100 amp panel with its own switch and breaker? Or are the lugs designed to secure only one wire.

Thanks

Doug